We watched Bitcoin grow from nothing to 4.8 billion market cap today.
Over the years there is always the fear that bitcoin will be banned and it's
value will go to zero.
Even if every gov on the earth banned it it's value wouldn't go to zero. It would possibly even rise because it will still have use on the black market and that's one thing that bitcoin will always have regardless of mainstream adoption.
If bitcoin can grow to 300 billion, like face book.
Then each coin will worth 10K?
Nobody can tell you the value of bitcoin in the future. It's all down to supply and demmand.